By

‘MI5 is carrying out its biggest operation since the Second World War with almost all of its 3,800 staff mobilised for the London Olympics which will take place amid rising concerns over the possibility of terrorist attacks.

Annual leave will be restricted at the agency and agents who would have been involved in counter-espionage have been moved to terrorism duties.

Although there is said to be “chatter” among jihadist groups about the Olympics, security officials have refused to discuss if cogent plots have been discovered. Senior sources say that in the last major sporting event seen as a target, the Commonwealth Games in India, planning by terrorist groups began around three months before the event started.’